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Mathcad - UF-ESI-6321-12-03-03

# Mathcad - UF-ESI-6321-12-03-03 - UF-ESI-6321 UF-ESI-03.xmcd...

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UF-ESI-6321 UF-ESI-6321-12-03-03.xmcd page 1 of 3 12.3.3 Oil Well Drilling Costs Consider the data set of oil well drilling costs given in DS 12.2.1. dollar amp := for unit handling x 5000 5200 6000 6538 7109 7556 8005 8207 8210 8600 9026 9197 9926 10813 13800 14311 ft := y 2596.80004882812 3328.00000000000 3181.10009765625 3198.39990234375 4779.89990234375 5905.60009765625 5769.20019531250 8089.50000000000 4813.10009765625 5618.70019531250 7736.00000000000 6788.29980468750 7840.79980468750 8882.50000000000 10489.50000000000 12506.59960937500 1000 dollar := n 16 := i 1 n .. := i x i 137498.000 ft = i y i 101523999.756 dollar = i x i ( ) 2 1287960086.000 ft 2 = i y i ( ) 2 762099377533262.13 dollar 2 = i x i y i ( ) 979168137354.980 ft dollar = x i x i n 8593.625 ft = := y i y i n 6345249.985 dollar = := Luther Setzer 1 NASA Pkwy E Stop NEM3, Kennedy Space Center, FL 32899 (321) 544-7435

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UF-ESI-6321 UF-ESI-6321-12-03-03.xmcd page 2 of 3 (a) What is the standard error of β 1 ? S XX i x i x - ( ) 2 106353835.750 ft 2 = := S XY i x i x - ( ) y i y - ( ) 106708954953.033 ft dollar = := β 1 S XY S XX 1003.33903521701 dollar ft = :=
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Mathcad - UF-ESI-6321-12-03-03 - UF-ESI-6321 UF-ESI-03.xmcd...

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